Surmodics, Inc.
Surmodics, Inc. (SRDX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SRDX · as of Sep 30, 2025
Ownership Breakdown
155
Institutional Holders
▲ 14 vs Q2
$345.17M
Total Inst. Value
▼ $18.75M vs Q2
14.30M
Shares Outstanding
freeFloat 91.33%
11.55M
13F Shares Held
▼ 701,133 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SRDX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. surgical & medical instruments & apparatus | 1.15M | 8.04% | 8.04% | $34.33B | Nov 12, 2025 | ▲ 1.3K |
ALLIANCEBERNSTEIN L.P. surgical & medical instruments & apparatus | 887.2K | 6.21% | 6.21% | $26.52B | Nov 14, 2025 | ▲ 36.7K |
VANGUARD GROUP INC surgical & medical instruments & apparatus | 809.9K | 5.67% | 5.67% | $24.21B | Nov 7, 2025 | ▼ 309 |
ODDO BHF ASSET MANAGEMENT SAS surgical & medical instruments & apparatus | 610.0K | 4.27% | 4.27% | $18.23B | Nov 14, 2025 | ▲ 341.9K |
HUDSON BAY CAPITAL MANAGEMENT LP surgical & medical instruments & apparatus | 536.3K | 3.76% | 3.76% | $16.03B | Dec 15, 2025 | ▲ 136.3K |
QUBE RESEARCH & TECHNOLOGIES LTD surgical & medical instruments & apparatus | 418.9K | 2.93% | 2.93% | $12.52B | Nov 14, 2025 | ▲ 25.0K |
GABELLI FUNDS LLC surgical & medical instruments & apparatus | 384.4K | 2.69% | 2.69% | $11.49B | Nov 12, 2025 | ▼ 30.5K |
READYSTATE ASSET MANAGEMENT LP surgical & medical instruments & apparatus | 383.0K | 2.68% | 2.68% | $11.45B | Nov 7, 2025 | ▼ 50.6K |
CITADEL ADVISORS LLC surgical & medical instruments & apparatus | 365.1K | 2.56% | 2.56% | $10.91B | Nov 14, 2025 | ▲ 302.8K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 339.0K | 2.37% | 2.37% | $10.14B | Nov 12, 2025 | ▲ 2.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
22
Increased
+1.42M shares7
New Positions
first time holders20
Decreased
−942.6K shares0
Sold Out
fully exitedNet shares change (top 50)
+480.4K
+1.42M / −942.6K
Net new holders
+9
7 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SRDX insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
76
Sell transactions
0.00
Buy/Sell ratio
$2M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 20,101 | $33.64 | $676.2K | 0 | Form 4 ↗ |
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 800 | $0.05 | $40 | 0 | Form 4 ↗ |
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 18,337 | $43.93 | $805.5K | 0 | Form 4 ↗ |
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 10,653 | $56.63 | $603.3K | 0 | Form 4 ↗ |
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 13,579 | $42.00 | $570.3K | 0 | Form 4 ↗ |
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 17,883 | $37.44 | $669.5K | 0 | Form 4 ↗ |
OLSON CHARLES W SVP, Medical Device Coatings | Nov 19, 2025 | D-Return | 19,243 | $36.13 | $695.2K | 0 | Form 4 ↗ |
Manders John D. VP Finance, Corp. Controller | Nov 19, 2025 | D-Return | 1,862 | $37.44 | $69.7K | 0 | Form 4 ↗ |
Manders John D. VP Finance, Corp. Controller | Nov 19, 2025 | D-Return | 4,810 | $36.13 | $173.8K | 0 | Form 4 ↗ |
Manders John D. VP Finance, Corp. Controller | Nov 19, 2025 | D-Return | 8,155 | $0.05 | $407.75 | 0 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Surmodics, Inc. (SRDX) is primarily owned by institutional investors, who hold approximately 80.8% of total shares outstanding. Company insiders own approximately 8.67%, while retail and public investors account for the remaining 10.57%.
The largest institutional shareholder of Surmodics, Inc. is BLACKROCK, INC., holding approximately 1.15 million shares — equal to 8.04% of outstanding shares — as of September 30, 2025.
A total of 155 institutional investors currently hold SRDX stock, with a combined institutional value of approximately $345,170,822 as of the most recent 13F filing period.
Frequently asked questions
SRDX ownershipSurmodics, Inc. (SRDX) is primarily owned by institutional investors, who hold approximately 80.8% of shares. The largest shareholder is BLACKROCK, INC. with a 8.04% stake. Company insiders hold 8.67%. Data sourced from SEC Form 13F as of September 30, 2025.